92 civic with k20a2 swap main drive belt !!

Hey gang i would need some help getting the right belt .
Civic 92 k20a2 swap no p/s no a/c ,
People in threads would be saying that it's an 50.5" 7 ribbed belt with a ep3(k20a3) tensionner but here's my dilemma ,
I do not know if i have an ep3 tensionner or the stock k20a2 one ??